body {
    font-family: '微软雅黑';
    background-color: rgb(247, 245, 240);
}

main {
    width: 1200px;
    min-height: 800px;
    border: 1px solid #cccccc;
    margin: auto auto;
}

.pip {
    display: block;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin: 4px;
    background-color: #333;
    box-shadow: inset 0 3px #111, inset 0 -3px #555;
}

[class$="face"] {
    display: inline-flex;
    margin: 16px;
    padding: 4px;

    background-color: #e7e7e7;
    width: 104px;
    height: 104px;
    object-fit: contain;

    box-shadow: inset 0 5px white,
    inset 0 -5px #bbb,
    inset 5px 0 #d7d7d7,
    inset -5px 0 #d7d7d7;

    border-radius: 10%;
}